tests/dnsrecord: Fix reverse zone prefix names.

Creation of reverse zone names were not using the pre-computed array,
and creation of the 8-bit network was wrong.

tests/dnsrecord/env_vars.yml

@@ -4,7 +4,7 @@
   set_fact:
     ipv4_prefix: "{{ ansible_facts['default_ipv4'].address.split('.')[:-1] |
                      join('.') }}"
-    ipv4_reverse_sufix: "{{ ansible_facts['default_ipv4'].address.split('.')[:-1] |
+    ipv4_reverse: "{{ ansible_facts['default_ipv4'].address.split('.')[:-1] |
                       reverse |
                       join('.') }}"
 
@@ -14,7 +14,7 @@
     safezone: 'safezone.test'
     zone_ipv6_reverse: "ip6.arpa."
     zone_ipv6_reverse_workaround: "d.f.ip6.arpa."
-    zone_prefix_reverse: "in-addr.arpa"
-    zone_prefix_reverse_24: "{{ ipv4_prefix.split('.')[::-1] | join ('.') }}.in-addr.arpa"
-    zone_prefix_reverse_16: "{{ ipv4_prefix.split('.')[1::-1] | join ('.') }}.in-addr.arpa"
-    zone_prefix_reverse_8: "{{ ipv4_prefix.split('.')[2::-1] | join ('.') }}.in-addr.arpa"
+    zone_prefix_reverse: "in-addr.arpa."
+    zone_prefix_reverse_24: "{{ ipv4_reverse.split('.')[:] | join ('.') }}.in-addr.arpa."
+    zone_prefix_reverse_16: "{{ ipv4_reverse.split('.')[1:] | join ('.') }}.in-addr.arpa."
+    zone_prefix_reverse_8: "{{ ipv4_reverse.split('.')[2:] | join ('.') }}.in-addr.arpa."